More features (#9)

* added config file implementation, refactoring
* add gitignore
* improved test
* preperations for more metrics
* added resource metrics
* added first bgp metrics
* added asn as label for bgp metrics
* added prefix and message counts to bgp metrics
* simplified
* Update README.md
* added yaml dependency
* fixed go routine call
* added timeout
* clean up
* added TLS support
* set default api port for TLS
* added routes metric
* added missing log information
* added type collectorContext to reduce the count of parameters for better readability
* added DHCP and DHCPv6 metrics
* filter for active dhcp leases only
* added pool metrics
* enable/disable feature in config file
* refactoring

* clean up

* comment fix

collector/helper.go

@@ -18,3 +18,12 @@ func descriptionForPropertyName(prefix, property string, labelNames []string) *p
 		nil,
 	)
 }
+
+func description(prefix, name, helpText string, labelNames []string) *prometheus.Desc {
+	return prometheus.NewDesc(
+		prometheus.BuildFQName(namespace, prefix, name),
+		helpText,
+		labelNames,
+		nil,
+	)
+}